[PATCH 05/16] cli, btrace: add btrace cli

[Eli Zaretskii]

> From: markus.t.metzger@intel.com
> Cc: markus.t.metzger@gmail.com, Markus Metzger <markus.t.metzger@intel.com>
> Date: Thu, 10 May 2012 17:13:19 +0200
> 
> Add branch trace commands:
> 
>   - "btrace enable/disable" perform the obvious operation
> 
>     ""     on the current thread.
>     "all"  on each existing thread.
>     "auto" on each newly created thread.
> 
>     Actually, "btrace enable auto" turns on automatic enabling for new threads,
>     and "btrace disable auto" turns it off, again.
> 
>   - "btrace list" prints the blocks that have been traced.
> 
>     The output may be configured using modifiers. It prints:
>       -  the block number
>       /a the begin and end code address of that block
>       /f the function containing the block
>       /l the source lines contained in the block
> 
>     With the /t modifier, it prints the total number of blocks and exits.
> 
>     It accepts an optional range argument specifying the range of blocks to be
>     listed. If no argument is given, all blocks are listed.
> 
>     The block number can be used to print the trace for one particular block or
>     for a range of blocks.
> 
>   - "btrace" prints the branch trace disassembly for the current thread.
> 
>     Branch trace is printed block-by-block. Typically, one block at a time is
>     printed.
> 
>     By default, the disassembly for the next block is printed, thus iterating
>     over the full branch trace.
> 
>     The command supports the /m and /r modifiers accepted by the disassemble
>     command.
> 
>     In addition, the command supports the following arguments:
>       - "<n>"      set the iterator to the <n>-th block
>       - "+[<n>]"   advance the iterator by <n>  (default: 1)
>       - "-[<n>]"   advance the iterator by -<n> (default: 1)
>       - "<l>-<h>"  set the iterator to the <h>'th block and
>                    print the blocks in the range in reverse (i.e. original
>                    control flow) order.
> 
>     Mixed source and disassembly does not work very well for inlined functions,
>     a problem that it shares with the disassemble command.

Thanks.  I'm quite sure we want these new commands documented in the
user manual, and mentioned in NEWS.